Update app.py

app.py

@@ -12,13 +12,14 @@ from langchain_community.document_loaders import PyPDFLoader
 
 import logging
 import sys
+import os
 
 logging.basicConfig(stream=sys.stdout, level=logging.INFO)
 logging.getLogger().addHandler(logging.StreamHandler(stream=sys.stdout))
 
 from llama_index import VectorStoreIndex, SimpleDirectoryReader, ServiceContext
 from llama_index.llms import HuggingFaceLLM
-from langchain.document_loaders import PyPDFLoader
+from langchain_community.document_loaders import PyPDFLoader
 
 documents = [SimpleDirectoryReader("Dat").load_data(file_path=file)[0] for file in os.listdir("Dat")]
 documents = [CharacterTextSplitter(separator="\n", chunk_size=1000, chunk_overlap=0).split_text(doc) for doc in documents]